Rotary brush



March 11 1947. c K|BBEE 2,417,113

ROTARY BRUSH Filed July 9, i943.

INVENTOR. C. MERTON Kl BBEE ATTORNEYS Patented Mar. 11, 1947 UNITED STAT E S PATENT F F I CE ROTARY BRUSH Charles'M'ert'onKibbee, Cleveland; Ohio; assignor to-The Osborn Manufacturing company, Cleve+- land, Ohio,- a corporation of. Ohio Application J iily 9], 1943, Serial No. 494,042

The present improvements, relating as indicatedto' rotary brushes; have more particular regard to rotary brushes of the general. type illustrated in Patent No. 938,27 to F. W. Riehl, dated October 26, 1909, in which bunches of brushmaterial are secured between side rings or plates and the latter are" then. in turn secured. against the base ofthe brush material on each side by means of tongues which project oppositely from an intermediate annulus and are. bent radially into engagement with such side plates or rings.

In a form of'such Riehl section brush which has beenextensively commercialized, the loops of brush material which form the tufts are secured to the central'Iannulus by being passed through apertures adjacentthe periphery thereof' which is a slow and tedious operation, and one not readily capable ofv being accomplished by mechanical means. We have discovered that by utilizing the same prongs or lugs thus employed to secure the parts of the sectiontogether as. attaching meansv for the. brush material, by simply folding bundles thereof. aroundsuch prongs, the filling operation may be more readily carried out by mechanical means and at the same time the necessity for certain. handspreading operations iseliminated.

We have also found that by a dillerent-relative disposition of the central annulus, to which the brush. material is thus. attached, and the side rings, the parts in question ma be secured together to form a compact solid base for the brush material, so that one or more sections whether directly mounted on an. arbor or through an intermediate hub, will. be cap-able of standing up under severe conditions of service, such as are encountered in. the industrialfield as in. cleaning and polishing castings and other metal parts.

To the accomplishment of the foregoing and related ends, said invention, then, consists of the means hereinafter fully described and particularly pointed out in the claims.

The annexed drawin and the following description set forth in; detail. certain mechanism embodying the invention, suchv disclosed. means constituting, however, but one ofv various mechanicalforms in. which theprinciple of the invention may be used.

In said annexed drawing:

Fig. 1 is. a. side. elevation of oneiiorm of rotary brush. embodying my present improvements; only a part of. the. brush. material. on onev side being shown;

Fig. 2 is a transverse section; of such: brush, the

2 plane of the section being indicated by the line 2-2 Fig. 1;

Fig. 3 is a. broken side elevation of a modified form of such brush with a portion broken away, in order to show the method of assembly;

Fig. 4 is a central section of such brush, the plane of the section being indicated by the line l'--4 Fig. 3;

Fig. 5 isa side elevation fied construction;

Fig. 6 is a central section of the latter, the plane of the section being indicated by the line 6 -46 Fig. 5;

Fig. 7 is a section ofa detail of one of the parts in such last mentioned brush, the plane of the section being indicated by the line 7-! Fig. 5; and

Fig; 8 is a perspective view of one of the structural elements'common to all three of the forms of brush illustrated in the previously described figures.

Each of the three forms of my improved rotary brush, as illustrated, consists of a single unit or so-called section which may be used as such or a plurality of such sections may be assembled side-by-side on an arbor or other suitablesupport to constitute a cylindrical brush of any desired longitudinal extent;

Referring to the form of brush or brush section illustrated in Figs. 1 and 2, the central element consists of a flat annulus l which is best shown in Fig. 8. Struck up from the inner edge of such annulus so as to outwardly project in opposite directions is a series of lugs or prongs 2,

of still another modi- 'preferably of' the elongated triangular form shown. The number of such prongs will depend on the diameter of the annulus or ring I which inturn depends on the internal diameter of the section. Similarly the length and other dimensions of prongs 2 will depend upon the character and amount of brush require to carry.

Such brush material 3 is of stranded form, e. g: of finely drawn wire or the like, successive bundles thereof being folded. around the projecting prongs 2. with the doubled ends of such material projecting: radially outwardly a desired distancebeyond the annulus I. In order to retain the tufts of brush material thus formed in place: on the central annulus, another fiat annulus 4- of approximately the same dimensions is' applied to the: outer sides of the folded bundles or tufts lyingoneach. side of the central annulus. The-prongs 21in thecentral annulus in their initial axial. projecting state are designed to enmaterial which they will gage the inner edges of annuli 6 respectively, and after the parts have been assembled as stated. such prongs are bent over, i. e. in a radially outward direction, so as to engage the outer faces of the corresponding annuli 4. The whole assembly is thus locked securely together, it being noted (see Fig. that the central annulus I and such side annuli 4 lie in side-by-side relation so that the bases of the doubled bundles or tufts of brush material will be tightly clamped together.

Such bases are furthermore secured in place by forcefully fitting in the central space left therebetween a hub 5 which will have an internal diameter corresponding with that of the arbor on which the brush is to be mounted. This hub may be made of lead or other similar metal composition, or of plastic or other material, such that when driven onto an arbor of slightly tapered form it will frictionally engage the latter without other clamping or mounting means being required.

The modified construction illustrated in Figs. 3 and 4 comprises a. central annulus l with brush material looped about prongs 2 thereon just as in the first described form of brush. The lateral annuli, l, 1, however, instead of being of substantially the same external and internal diameter as such central annulus, are made of substantially smaller internal diameter and provided with apertures 8 through which the prongs I on the central annulus pass before being bent radially outwardly to clamp the parts together. Such side annuli are furthermore formed with radial depressions 9 associated with the apertures 8 in which such outwardly bent prongs are received with the result that the latter will lie substantially flush with the outer faces of the side annuli. The character of these depressions 9 is substantially as shown in Fig. '7 which illustrates corresponding depressions in the third illustrated form of the brush.

In the construction thus illustrated in Figs. 3 and 4, a hub if! of character similar to previously described hub 5 is employed, such hub having peripheral grooves ll wherewith engage the inner edges of the side annuli I, thus providing additional means for holding the hub firmly in place.

In the remaining modified form illustrated in Figs. 5 and 6, the same central annulus is employed as before with the brush material secured thereto in the same manner, the only difference again residing in the side annuli l2, l-2. These, as in the case of the second form of brush, have substantially the same outer diameter as the central annulus but extend inwardly beyond the latter and are formed with inturned flanges l3 which take the place of a solid hub, such as hubs 5 and Hi, as a means for mounting the brush section on an arbor or like support. As in the case of the second form, said side plates 12 are provided with apertures M through which the tongues 2 of the central annulus pass before being bent radially outwardly, such apertures lying in depressions l5 designed to receive such prong ends so that the latter will lie substantially flush with the outer faces of the annuli.

By using a central annulus of the form illus trated to carry the series of tufts or doubled bundlcs of brush material which constitute the filler,

the latter may be initially secured in place on the prongs Z by simply looping such tufts upon the prongs 2, first on one side, then the other, of the central annulus, the side annuli are next slipped over the prongs and by bending the latter over, the assembly of the section is thereupon completed save for the insertion of the hub where the latter is a separate part, as in the case of the first two illustrated forms of the brush. In all such forms, as previously observed in connection with the first thereof, the side annuli overlie the central annulus so that, as well illustrated in the sectional views of Figs. 2, 4 and 6, the assembled brush section is quite compactly and solidly constituted throughout the corresponding circular area. In other words, the strands of doubled brush material are not held merely by the prongs on the central annulus or by clamping means provided interiorly of such prongs, but throughout a circular area lying beyond the latter. Thus there is secured an even distribution of the outer portions of the brush material with consequent improvement of the working face of the brush and the component strands are less liable to break due to severe vibratory action at their bases.

In the case of the modified forms of brush section illustrated in Figs. 3 and 5, where the side plates extend radially inwardly to enclose the looped bases of the tufts of brush material, the prongs 2, if desired, may be bent radially inwardly instead of outwardly, although the outward direction of bending is preferred.

Where a separate center or hub of lead or like material is employed, as illustrated in Figs. 1 and 2, such hub should be inserted before the prongs are bent into their final position. In one method of inserting the hub a drift is first forced into the central opening to push the bases of the brush material as looped about such prongs outwardly against the latter. The lead center is then inserted in place of the drift, being somewhat smaller in diameter and longer than in its final dimensions, the latter being assumed on flat pressing such center, when the plastic nature of the lead causes it to flow somewhat and fit itself about the looped ends of the brush material. On the other hand, the lead center may be made part of the tool that is inserted to spread the brush material. When in proper position it is then squeezed between the two halves of the drift tool to cause it to flow out and fit around such rush material, as before. The point of the drift can then be removed and the brush pulled from the pilot that conforms to the arbor holeof the lead center.

Other modes of applying the principle of my invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed, provided themeans stated by any of the following claims or the equivalent of such stated means be employed.

I therefore particularly point out and distinctly claim as my invention:

1. In a rotary brush, the combination of a central fiat annulus having a series of oppositely projecting tongues along its inner edge, radially extending tufts of brush material looped about such tongues, respectively, the bases of such. tufts extending within such inner edge, and a flat annulus of approximately the same external diam eter as said central annulus applied to each side of said assembled brush material, said tongues being bent in radial direction into engagement with said side annuli, whereby said brush material is laterally pressed against and supported by said central annulus, and said side annuli being formed with depressions .to receive said tongues.

2. In a rotary brush, the combination of combined means forming tongues for loops of brush tufts and reinforcingly separating between layers of tufts, embodying a central flat annulus having a series of oppositely projecting tongues along its inner edge, radially extending tufts of brush material looped about such tongues, respectively, the bases of such tufts extending within such inner edge, a flat annulus of approximately the same internal and external diameter as said central annulus applied to each side of said assembled brush material, said tongues bein bent in radial outward direction into engagement with said side annuli, whereby said brush material is laterally pressed against and supported by said central annulus, and a hub tightly fitted into the opening bounded by the bases of the looped tufts of said material.

3. In a rotary brush, the combination of means forming tongues for loops of brush tufts and reinforcingly separating such layers of tufts, comprising a central flat annulus having a series of oppositely projecting tongues along its inner edge; radially extending tufts of brush material looped about said tongues, respectively, the bases of such looped tufts extending inwardly of such REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Date Carman, et a1 June 14, 1927 Williams Mar. 29, 1887 Radinse Aug. 1, 1933 Peterson June 1, 1943 Herold Aug. 1, 1939 Number 

